Man-Chien Chao

Control of single crystal morphology of SBA-1 mesoporous silica

SBA-1 mesoporous silica has been synthesized in different crystal shapes from C18TMACl–sodium silicate–H2SO4–H2O at pH values between 1.0 and 2.0.

W/Zr mixed oxide supported on mesoporous silica as catalyst for n-pentane isomerization

Abstract WO 3 /ZrO 2 mixed oxides supported on various porous silica were prepared. For the mesoporous silica, SBA-15 was found to retain the crystalline structure better than MCM-41 after loading W/Zr mixed oxides. Tungstated zirconia is mainly dispersed into the mesoporous channels of SBA-15, which causes the dramatical decrease in the surface area and pore volume. All the mesoporous siliceous materials supported solid acid samples showed strong acidity. The SBA-15 supported WO 3 /ZrO 2 materials promoted with Pt were highly efficient in catalyzing the isomerization of n-pentane with a high selectivity of iso- pentane. SBA-15 with 1 %Pt/20%WO 3 /40%ZrO 2 gave the highest catalytic activity. This work was supported by China Petroleum Corporation and National Science Council of Taiwan.

08-P-07-A study on the mesoporous silica structures templated by triblock copolymers

Publisher Summary This chapter presents the study on the mesoporous silica structures templated by triblock copolymers. The well-ordered mesostructures SBA-15 or SBA-16 could fast grow from the chemical composites of triblock copolymers (EO n PO m EO n )-TEOS-HCl-H 2 O. At the desired TEOS/EO 20 PO 70 EO 20 ratio, an organic surfactant-silica macrosphere of about 1 cm is successfully obtained, and the organic–inorganic mesostructural macrospheres have the elastic property. Posthydrothermal treatments at high temperature promote the increase of the unit cell and pores.